What? Rumors work by people discussing them.

I didn’t ask for proof.

Can I find out more about these rumors somewhere?

The mirrors are the not the expensive part.

In your example what happens if the shirt is sold to someone else? In the NFT case the signature changes.

The shirt analogy doesn’t work well, but NFTs are great for transferable tickets.

However NFTs were trying to assign value to the receipt for the Gretzky shirt.

Is this practical? How technically difficult is it? What are the hardware requirements?

Screencheet. It’s the only fair combative experience.